CN211350353U - Multi-cake comb-free encapsulated high-voltage winding of dry-type transformer and dry-type transformer - Google Patents
Multi-cake comb-free encapsulated high-voltage winding of dry-type transformer and dry-type transformer Download PDFInfo
- Publication number
- CN211350353U CN211350353U CN202020257571.4U CN202020257571U CN211350353U CN 211350353 U CN211350353 U CN 211350353U CN 202020257571 U CN202020257571 U CN 202020257571U CN 211350353 U CN211350353 U CN 211350353U
- Authority
- CN
- China
- Prior art keywords
- cake
- dry
- type transformer
- voltage winding
- windings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Insulating Of Coils (AREA)
Abstract
The utility model discloses a many cake formulas of dry-type transformer do not have broach encapsulated high voltage winding, the cake formula of a plurality of series connections on the inner liner including inner liner, coiling divides winding, its characterized in that: the inner lining cylinder is provided with flanges at two ends and further comprises an encapsulated insulating medium formed by elastic insulating materials, and the encapsulated insulating medium encapsulates all the cake-type sub-windings, so that the elastic insulating materials are filled between the cake-type sub-windings and the inner lining cylinder, between the cake-type sub-windings and the flanges at two ends and are not in contact with each other. The utility model discloses a do not have the broach between the cake formula sectional group to do the partition and support, the cake formula sectional group inboard also with interior bushing contact, eliminated any solid interface between the adjacent cake formula sectional group, strengthened the dielectric strength between the adjacent cake formula sectional group, the purpose is avoided producing the edgewise high-pressure discharge between the adjacent cake formula sectional group, improves the anti lightning impulse's of high-voltage winding ability.
Description
Technical Field
The utility model relates to a dry-type transformer many cakes formula does not have broach encapsulated high voltage winding and dry-type transformer.
Background
The traditional multi-segment pie winding structure is mainly used for high-voltage windings of open-type transformers, and as shown in fig. 1, the structure is composed of a rigid insulating lining cylinder 100, a plurality of rigid insulating comb racks 200, and a plurality of serially connected pie-shaped sub-windings (or called wire cakes) 300 formed by parallelly winding wires with insulating films. The comb teeth on the comb teeth bar play the role of a framework between the line cakes, and all the comb teeth bars are bonded and fixed on the periphery of the lining cylinder. The normal power frequency voltage born between two adjacent wire cakes is not high when the transformer works, and the comb teeth serving as the framework do not influence the insulating property between the wire cakes. However, in the lightning stroke process, several adjacent line cakes near the incoming line end of the high-voltage winding may bear lightning transient voltage which is much larger than normal power frequency voltage, and the surfaces of comb teeth clamped between the line cakes form a solid interface which can greatly weaken the insulation strength between the adjacent line cakes; meanwhile, if the wires on the inner side of the wire cake contact the insulating lining cylinder, the interface formed on the outer surface of the lining cylinder can weaken the insulating strength between the adjacent wire cakes, and the adjacent wire cakes are easily discharged along the comb teeth or the surface of the lining cylinder under the action of lightning transient high voltage.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dry-type transformer many cake formulas do not have broach encapsulated high voltage winding, there is not other solid construction spare such as the interface that broach or interior bushing brought between the adjacent cake formula subdivision group of inside, between the cake formula subdivision group, between cake formula subdivision group and the interior bushing, and fill with elastic insulation material between both ends cake formula subdivision group and the upper and lower flange and keep apart, whole winding has elastic insulation material and encapsulates outward, just so improved the dielectric strength between the cake formula subdivision group, thereby the ability of whole winding withstand the thunder electricity and strike has been improved.
The purpose of the utility model is realized through the following technical scheme:
the utility model provides a many cake formulas of dry-type transformer do not have broach encapsulated high voltage winding, includes interior bushing, the cake formula of a plurality of series connection of coiling on interior bushing divides winding, its characterized in that: the inner lining cylinder is provided with flanges at two ends and further comprises an encapsulated insulating medium formed by elastic insulating materials, and the encapsulated insulating medium encapsulates all the cake-type sub-windings, so that the elastic insulating materials are filled between the cake-type sub-windings and the inner lining cylinder, between the cake-type sub-windings and the flanges at two ends and are not in contact with each other. The connection wires between the lead-out wires and the pie-shaped sub-windings at two ends and between the pie-shaped sub-windings and the flanges are completely filled and wrapped by elastic insulating materials, and other insulating parts do not exist.
Preferably, the lining barrel and the flange are made of rigid insulating materials.
Preferably, the rigid insulating material is a glass fiber epoxy material, an epoxy resin material, a polyimide material, and an FR-4 material.
Preferably, the flange is integrally formed with the lining sleeve, or the flange is seamlessly bonded to the lining sleeve.
Preferably, the elastic insulating material is an insulating material solidified after liquid pouring, and the same liquid material and the solidified material can be well bonded into a whole, such as silicon rubber.
The invention also discloses a dry-type transformer which comprises the multi-cake comb-teeth-free encapsulated high-voltage winding.
The utility model discloses beneficial effect as follows:
(1) the high-voltage winding of the utility model is composed of an insulating lining cylinder with flanges at two ends, a plurality of cake-type sub-windings which are connected in series after segmentation and an insulating material which is filled and encapsulated; the comb teeth are not arranged between the pie-shaped sub-windings for separation and support, the inner sides of the pie-shaped sub-windings are not in contact with the inner lining barrel, any solid interface between the adjacent pie-shaped sub-windings is eliminated, the insulating strength between the adjacent pie-shaped sub-windings is enhanced, the purpose is to avoid the generation of surface high-voltage discharge between the adjacent pie-shaped sub-windings, and the capability of the high-voltage winding for resisting lightning impact is improved.
(2) The prefabricated inner lining cylinder on the inner side plays a role of a main framework and plays a role of supporting the whole winding. The two ends of the straight cylinder are provided with rigid flanges which are seamlessly connected into a whole, and the flanges can play a role in protecting and supporting the winding, particularly for a high-voltage winding which is filled and encapsulated by elastic insulating materials.
Drawings
Fig. 1 is a schematic diagram of a longitudinal section structure of a comb-teeth multi-pie high-voltage winding of a conventional open-type transformer.
Fig. 2 is a top view of a comb-teeth multi-pie high-voltage winding of a conventional open-type transformer.
Fig. 3 is a schematic diagram of a longitudinal section structure of a multi-pie comb-teeth-free encapsulated high-voltage winding of the dry-type transformer of the present invention.
Detailed Description
Example 1
A630 kVA/10kV dry-type transformer high-voltage winding poured by silicon rubber is characterized in that a glass fiber epoxy resin material is selected to be made into an oval inner lining barrel 1, two flanges 2 are subjected to annular copying processing by epoxy resin plates and are closely and neatly adhered to two ends of the inner lining barrel by high-performance epoxy resin, tens of cake-type sub-windings 3 are wound on a temporary support by a film-covered conducting wire, copper connectors of outgoing wires and sub-winding assembly wires are installed and then are placed into a die, ZS-GF-5299W liquid silicon rubber is used for pouring to form an encapsulated insulating medium 4, and then the encapsulated insulating medium 4 is solidified and demolded to be made into the high-. After the dry-type transformer is assembled by three same windings, the three-column iron core and the three low-voltage windings, a lightning impulse test is carried out according to the GB1094.11 standard, and the result test is passed.
Example 2
A high-voltage winding of 1600kVA/20kV dry-type transformer poured by silicon rubber is characterized in that a glass fiber epoxy resin material is selected to be made into a circular inner lining cylinder, two flanges are integrally processed by the same material as the inner lining cylinder, a film-covered lead is used for winding dozens of cake-type sub-windings on a temporary support, copper connectors of outgoing lines and sub-winding assembly lines are installed and then installed in a die, ZS-GF-5299W liquid silicon rubber is used for pouring to form a packing insulating medium, and then the high-voltage winding is manufactured by solidification and die removal. After the dry-type transformer is assembled by three same windings, the three-column iron core and the three low-voltage windings, a lightning impulse test is carried out according to the GB1094.11 standard, and the result test is passed.
Example 3
A high-voltage winding of a 100kVA/10kV dry-type transformer poured by silicon rubber is characterized in that a polyimide material is selected to be made into an oval inner lining cylinder, two flanges are subjected to annular profiling processing by using FR-4 plates and are closely and neatly adhered to two ends of the inner lining cylinder by using high-performance glue, tens of pie-type sub-windings are wound on a temporary support by using a film-covered conducting wire, a copper joint of a lead wire and a sub-winding group wire is arranged and then is arranged in a mold, ZS-GF-5299W liquid silicon rubber is used for pouring to form a wrapping insulating medium, and then the wrapping insulating medium is solidified and removed from the. After three identical windings, a three-column iron core and three low-voltage windings are assembled into a three-phase dry-type transformer, a lightning impulse test is carried out according to the GB1094.11 standard, and the result test is passed.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (6)
1. The utility model provides a many cake formulas of dry-type transformer do not have broach encapsulated high voltage winding, includes interior bushing, the cake formula of a plurality of series connection of coiling on interior bushing divides winding, its characterized in that: the inner lining cylinder is provided with flanges at two ends and further comprises an encapsulated insulating medium formed by elastic insulating materials, and the encapsulated insulating medium encapsulates all the cake-type sub-windings, so that the elastic insulating materials are filled between the cake-type sub-windings and the inner lining cylinder, between the cake-type sub-windings and the flanges at two ends and are not in contact with each other.
2. The multi-pie comb-teeth-free encapsulated high-voltage winding of a dry-type transformer according to claim 1, wherein: the lining cylinder and the flange are made of rigid insulating materials.
3. The multi-pie comb-teeth-free encapsulated high-voltage winding of a dry-type transformer according to claim 2, wherein: the rigid insulating material is a glass fiber epoxy material, an epoxy resin material, a polyimide material and an FR-4 material.
4. A dry-type transformer multi-pie comb-teeth-free encapsulated high-voltage winding according to any one of claims 1-3, wherein: the flange and the lining barrel are integrally formed, or the flange is bonded on the lining barrel without a gap.
5. The multi-pie comb-teeth-free encapsulated high-voltage winding of claim 4, wherein: the elastic insulating material is silicon rubber.
6. A dry-type transformer, characterized by: a dry-type transformer multi-pie comb-teeth-free encapsulated high-voltage winding comprising any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020257571.4U CN211350353U (en) | 2020-03-05 | 2020-03-05 | Multi-cake comb-free encapsulated high-voltage winding of dry-type transformer and dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020257571.4U CN211350353U (en) | 2020-03-05 | 2020-03-05 | Multi-cake comb-free encapsulated high-voltage winding of dry-type transformer and dry-type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211350353U true CN211350353U (en) | 2020-08-25 |
Family
ID=72099721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020257571.4U Active CN211350353U (en) | 2020-03-05 | 2020-03-05 | Multi-cake comb-free encapsulated high-voltage winding of dry-type transformer and dry-type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211350353U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114300238A (en) * | 2021-12-29 | 2022-04-08 | 江苏神马电力股份有限公司 | Winding body of high-voltage winding and high-voltage winding |
| WO2023124608A1 (en) * | 2021-12-29 | 2023-07-06 | 上海置信电气有限公司 | Elastic electrical insulator fully-encapsulated dry-type transformer winding structure and manufacturing method |
| WO2023125633A1 (en) * | 2021-12-29 | 2023-07-06 | 江苏神马电力股份有限公司 | High-voltage winding and method for preparing high-voltage winding |
-
2020
- 2020-03-05 CN CN202020257571.4U patent/CN211350353U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114300238A (en) * | 2021-12-29 | 2022-04-08 | 江苏神马电力股份有限公司 | Winding body of high-voltage winding and high-voltage winding |
| WO2023124608A1 (en) * | 2021-12-29 | 2023-07-06 | 上海置信电气有限公司 | Elastic electrical insulator fully-encapsulated dry-type transformer winding structure and manufacturing method |
| WO2023125633A1 (en) * | 2021-12-29 | 2023-07-06 | 江苏神马电力股份有限公司 | High-voltage winding and method for preparing high-voltage winding |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211350353U (en) | Multi-cake comb-free encapsulated high-voltage winding of dry-type transformer and dry-type transformer | |
| CN2821822Y (en) | Outdoor dry high voltae capacitance voltage mutual inductor | |
| US4129938A (en) | Method of making tubular coils with cooling and insulating channels | |
| CN102013322B (en) | Dry type high-voltage capacitor core and manufacture method thereof | |
| CN102064011A (en) | Voltage transformer | |
| CN201549358U (en) | High-capacity voltage transformer capable of reducing local electric discharge | |
| CN102930967B (en) | A kind of GIS bundling type current transformer and preparation method thereof | |
| CN105761911B (en) | A kind of epoxy cast transformer and its manufacturing method of compound main airway insulation system | |
| CN103050234A (en) | Dry transformer | |
| CN202796409U (en) | Dry type voltage transformer for switchgears | |
| CN208093344U (en) | A kind of dc circuit breaker energy supply transformer | |
| CN201918250U (en) | Voltage transformer | |
| CN2743950Y (en) | Voltage transformer with resonance resisting capacity | |
| CN210378715U (en) | High-voltage wire outlet structure of dry type transformer | |
| CN108369855B (en) | Dry-type cast transformer with flexible connecting terminal | |
| CN213025785U (en) | Current transformer with high-voltage shielding device | |
| CN209912697U (en) | Novel dry-type transformer | |
| CN102969723A (en) | Integrated energy extracting device for power electronic equipment | |
| CN201590322U (en) | Anti-foul voltage transformer with small partial discharge | |
| CN101471171A (en) | Amorphous alloy oil immersion type distribution transformer body structure and manufacturing method thereof | |
| EP0190930A2 (en) | Transient voltage protection for toroidal transformer | |
| CN2821819Y (en) | Resin insulation non-crystal alloy dry earthing transformer | |
| CN218676743U (en) | Anti-short-circuit three-dimensional triangular rolled iron core oil-immersed transformer | |
| CN203481017U (en) | Dry-type transformer | |
| CN204834307U (en) | Insulator arrangement of dry -type transformer coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215127 unit 201, property building, No. 8, phase II, Zhongxin science and technology industrial building, No. 1, Kezhi Road, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: Sirui green electric (Suzhou) Co.,Ltd. Address before: 212000 No. 1 Nan Zi Road, Yangzhong science and Technology Park, Zhenjiang, Jiangsu Patentee before: JIANGSU DAHANG YOUNENG POWER TRANSMISSION AND DISTRIBUTION Co.,Ltd. |